A fun twist on a classic collagen chew! These Collagen Donuts are made with a single ingredient beef and shaped into rings that are easy for dogs to hold in their paws. 4 inch best suited for small to medium sized dogs 6 inch best suited for medium to large sized dogsSupervision is recommended when feeding any chew to your dog. Make sure there is adequate fresh drinking water during consumption. If your pet is new to protein rich chews, we recommend moderate consumption to avoid upset stomachs.